Hotel door hidden anti-theft chain can not be pressed down.

Does the subject want to ask "the reason why the hidden anti-theft chain of the hotel door can't be pressed down" As follows:

1. The inside of the hotel door is double-insured, and there is an anti-theft chain. After it is locked, it cannot be opened outside. One side of the anti-theft chain is movable and the other side is fixed.

2. Put the chain head into the lock and put it along the inside of the card slot, which can play the role of double safety, but it is only an auxiliary role and can be clipped off with metal pliers.

It is impossible to take down the chain from the outside. When the anti-theft chain is hung, the door can only be opened 5 to 8 cm, and people can't get through.